In a lot of late-model cars, the factory gauges, warning lights and other modules don't get their information from dedicated wires. They listen for messages from the engine computer on the car's CAN network. Pull the OEM ECU out and those messages stop, so the tach may sit at zero, the temperature gauge dies, or other modules complain.
The Vehicle CAN Bus function lets the Elite fill that gap. When you choose a supported vehicle, the ECU broadcasts the messages that car's factory modules and dash expect to see. It's separate from the Haltech CAN bus, which is the network for Haltech's own devices like wideband controllers and dashes.
Setting it up in ESP
- Pick your car from the dropdown list of supported vehicles.
- Choose which CAN port the vehicle bus should be broadcast on, then wire that port into the car's CAN network.
- Check that the factory dash and modules respond as expected.
The list grows over time, because Haltech adds applications through firmware updates. If your car isn't there, updating to the latest firmware is the first thing to try. See the CAN bus overview, or ask us whether your car is covered.
